For a person (agent muɴ-) to undermine something (loc ref -an), with a suitable instrument (inst i-, puɴ-), as a stone, a stone wall, causing it to topple or fall down.
Bo''an Uddāpon nan lūta ta way aton han ongol an batu an mayangyāngan ta way atōna an mapūlig.
Bokkah will dig the soil so that the large stone will be undermined so that it will roll down (the slope).